SILICONE PREPARATION SUITABLE FOR THE PREPARATION OF MULTILAYER COMPOSITE

The present invention relates to a first kit comprising a composition (a) and a composition (b), wherein composition (a) and composition (b) are spatially separated from each other and composition (a) and composition (b) comprise(A-1) 100-350 parts by weight of a linear organopolysiloxane having terminal alkenyl groups and a molecular weight Mw of 3000 g/mol or more;(A-2) 25-100 parts by weight of an organohydrogenpolysiloxane having 5-300 siloxane repeating units, of which 2-100 repeating unit have Si-H bonds;(A-3) 0-150 parts by weight of hydrophobized silica that optionally has alkenyl groups on its surface;(A-4) 0-40 parts by weight of a linear organopolysiloxane having at least two alkenyl groups per molecule and having a molecular weight Mw of 3000 g/mol or more;(A-5) 0.1-1000 ppm of a hydrosilylation catalyst comprising a transition metal, expressed in terms of the weight of the transition metal relative to the total weight of components (A-1) to (A-4);(B-1) 200-450 parts by weight of a silicone resin containing at least one group -SiR9bY3-b, whereinR9is a hydrocarbon group having 1-20 carbon atoms, that is optionally substituted with an acryloyl group, a methacryloyl group, or a combination of these;Y is a hydroxyl group or a hydrolysable group selected from halogen and an alkoxy group having 1-3 carbon atoms,b is 0, 1 or 2;(B-2) 25-125 parts by weight of an organic polymer having at least two groups -SiR6aX3-aattached to its polymer backbone, whereinR6is a hydrocarbon group having 1-20 carbon atoms,X is a hydroxyl group or a hydrolysable group selected from halogen and an alkoxy group having 1-3 carbon atoms,a is 0, 1 or 2, andthe polymer backbone is selected from a polyether, polyurethane, polyacrylate poly(meth)acrylate, saturated polyolefin and polyester;(B-3) 0-25 parts by weight of a silane component selected from Si(O-R7)4, (R8)Si(O-R7)3and a combination of these, whereinR7is a linear or branched alkyl group having 1-4 carbon atoms andR8is a linear or branched alkyl group having 1-4 carbon atoms, a linear or branched alkyl group having 1-4 carbon atoms which is substituted with H2C=CH-C(=O)-O- or a linear or branched alkyl group having 1-4 carbon atoms which is substituted with H2C=C(CH3)-C(=O)-O- and;(B-4) 0.5-5 % by weight of a condensation reaction catalyst, relative to the total weight of components (B-1), (B-2) and (B-3);(C) 150-400 parts by weight of a filler;wherein the total amount of components (A-1) to (A-4), (B-1), (B-2) and (B-3)